Dental securing device.



No. 733,320. PATENTBD JULY 7, 1903. W. E. GRISWOLD.

DENTAL SECURING DEVICE.

APPLIGATION FILED JUNE 14, 1902.

no MODEL.

W lT/VESSES:

Patented July '7, 1903.

PATENT OFFICE.

\VILLIAM EVERETT GRISVVOLD, OF NEW YORK, N. Y.

DENTAL SECURING DEVICE.

SPECIFICATION formingpart of Letters Patent No. 733,320, dated July 7,1903. Application filed June 14, 1902. Serial No.111,669. (No model.)

To aZZ whom, it may concern:

Be it known that I, WILLIAM EVERETT GRIsWOLD,'a citizen of the UnitedStates, residing at New York, in the'county of New York and State of NewYork, have invented certain new and useful Improvements in DentalSecuring Devices; and-I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to dentistry. Its ob ject is to provide dentalsecuring devices that consist, essentially, of interlocking springmembers adapted to be applied to opposing or opposite parts of thedenture.

In the accompanying drawings, Figure l is a perspective of a portion ofa jaw with an attaching device above ready to'be put in place. Fig. 2aredetail perspectives of two complementary attaching devices known asthe 'V-fastener. Fig. 3 is 'a division of an attaching device with anaccompanying detail of a tension-spring. Fig. 4: is a perspective of thecomplementary securing devices of a T-fastening. Fig. 5 is a sideelevation of a form of coil-spring adapted to be used. Fig. 6 is asection of the two parts joined. Fig. 7 is a side elevation of a form ofcoilspring. Fig. 8 is a perspective of the complementary parts of theL-shaped fastening devices. Fig. 9 is a vertical section of aspring-fastening, together with an enlarged detail of a spring used as atension device. Fig. 10 is a side elevation of a tooth with one part ofa form of fastening secured to it, and Fig. 11 is a section of a toothand fastening secured.

In the drawingslhave illustrated what may be roughly termed three formsof fasten: ings-a l-fastening, a T-fastening, and an L-fastening. In allthese fastenings I provide for a male member and a female member and aninterlocking feature. Inthe V-fastening at Figs. 2 and 3 I haveillustrated the female member as having a series of corrugations on theside and the male member as having ribs on the side which are adapted toengage the corrugations, the character of the engagement depending uponthe distance the male member is forced into the female member. I may ofcourse vary the ratio of the ribs and what may be roughly termed Vshape, so

that the apex of the V when the male member is forced into the femalemember may close the opening in that member, forming a compact fastener,though in some instancesI may reverse the relative arrangement. Thebottom of the male member maybe closed and the top of the memberinclosing it may be covered over with a plate secured after the partsare placed so that the whole fastening is closed in. In Fig. 3 I haveshown the V member with a spring. (Illustrated in detail below.) Thespring may serve to tension the sides of the male member to force it outinto an assured and firm contact with the corrugations of the femalemember where a peculiarly tight fit is desired. In the T-shaped memberand the L-shaped member of Figsd to 9 I provide likewise forinterlocking features; but in these devices I have illustrated salientpoints of a tension-spring or coil-spring with flaring arms aspreferably passing through openings in the side of the male member, sothat the points may press out into the corrugations of the femalemember, and thus secure the two together, as especially illustrated inthe section of Fig. 6. The L and T devices have wings or flanges on thesides for the purpose of securing them to a crown, root-cap, or otherfeature and forming an attaching-base.

In the drawings, 1 represents the male V member; 2, the female member;3, corrugations in the side of the female member; 4, ribs formed on theoutside of the male member.

dis a spring adapted to be applied, if desired, to the male member.

6 is a closed bottom of the male member.

7 is a bevel shown on the top of the male member. ,There maybeacorresponding bevel on the female member.

8 is the body of the male T-shaped mem her; 9, the body of the femaleT-shapedmember; 10, corrugations of that member; 11, perforations in thesides of the male member; 12, a coiled spring having its flaring endsbent to form salient points 13, which project through the perforations11 and engage the corrugations or recesses l0. 14 is another form ofcoiled spring having salient points 15. This spring may be used insteadof the spring 12, though requiring the perforations to be placed lowerin the sides of the male members. These binding-springs and the onedescribed hereinafter illustrate some of the forms which may be appliedand indicate that the form of the spring is subject to manymodifications.

16 is a bottom, which may be integral with the male member; 17, a platewhich may be soldered on the top of the member inclosing it, thuscovering the two devices when secured together.

18 represents wings or flanges on the side of the securing devicesadapted to be attached 'tU-thebase of a root, crown, or cap.

In FignS I have applied the reference-letters as in the description andillustration preceding of the T-shaped fastener, Figs. 4 and 6.

In Fig. 9 the section may be regarded as a vertical section lookingtoward the front of the male member of Fig. 8. The figure is purposedmerely to show the relative position of the modified spring 19 with itssalient points 20.

In Fig. 10, 21 is a tooth. 22 is a slightlymodified male member of aT-shaped fastening secured to the tooth, the rounded sides of thefastening permitting the perforations 11 to show.

In Fig. 11, 21 is asection of a tooth, with the male member 8 and thespring 19 in position, illustrating the manner in which a long wing orflange may pass around the curve of a tooth or crown to secure a firmerattachment or add a base.

In Fig. 1, 23 is a wire to which is soldered at opposite ends two femalemembers 2 of the V-shaped fastening. The wire 23 may be inclosed invulcanite or soldered to a saddle, and the female members may then beforced down over the male members 1, one of which is shown attached to acrown 25, the other to a root-cap 26, both being shown in place on aportion of the jaw (or'a model) 24. The beveled edges of the male memberpermit the user to readily find the proper position in placing thevulcanite or saddle, especially when the female member iscorrespondingly beveled or flared. Hitherto I have described thesespring-fastenings with general reference to the common features.

There are specific features of detail in the fastening of Figs. 1, 2,and 3 which require further description. The-female member 2 has, asillustrated, a back 30,which may form as soldered to the root-cap. Themember 2 has also two converging sides 31 and 32,which may yield on theintroduction of the male member, the narrow opening between the sidesbeing closed by the apex of the male member. 33 indicates an upward bendor flare given the metal, so that it may more readily take over thebeveled portion 7 of the male member when applied as illustrated in Fig.1, for example. In the member 1 there are two diverging sides 34 and 35,which diverge from the apex 36. The diverging sides are bent to form twoapproaching lips 37 and 38 with a sufficient interval to provide for thedesired spring of the metal. When the male member is applied to thefemale member as previously described, the apex 36 will project slightlythrough the opening between the sides 31 and 32 of the member 2, whilethe lips 37 and 38 will lie against the flat back 30, so that the member1 may readily be forced into the member 2 without having any sharp edgesof the member 1 interfere with such fit, and at the same time there isprovided a solid supporting-back for the combined members as thusjoined. I have shown ribs 4 on the member 1 and have also in Fig. 3illustrated a simple spring which may tension the member 1 against thesides of the member 2 when in place. his obvious that instead of theribs 4 I may provide the perforations 11, as illustrated in Figs. 4 to10, and apply the coiled spring with salient points, as illustrated inthose figures.

In Fig. 11, as described, the application and use of the Wings areillustrated. These wings facilitate soldering to the crown. The wings onthe male member lie upon and embrace the female member and close in thewhole, so that it may be finished smoothly. The wings form a claspwhichextends partially around the tooth and may be used as a surface to buildporcelain against in making a porcelain denture, so as to give aclose-denture between the removable parts and the stationary crown. Theyalso make the work more rigid and strengthen the denture to resistlateral strain.

Having fully described my invention, what I claim is- 1. A dentalspring-metal securing device comprisinga female member having convergingsides, a male member having diverging sides and adapted to close theopening between the converging sides of the female member.

2. A dental spring-metal securing device comprising a female memberhaving converging sides, a male member having diverging sides, andcomplementary interlocking ribs and recesses.

3. A dental spring-metal securing device comprising a female memberhaving converging sides, and a male member having diverging sides andapproaching lips.

4. A dental spring-metal securing device IIO comprising a female member,a substantially V-shaped male member, adapted to fit into and beinclosed by the female member and perforations to engage thecorrugations or recesses.

6. A dental securing device comprising to close the opening between thesides of the complementary ribbed and recessed parts,

5 female member, and means for closing the top and bottom of thecombined members.

5. A dental spring-metal fastening comprising a male member havingperforations in its sides, a female member having corrugations orrecesses in its sides, and a spring bent to present salient pointsthrough the and a binding-spring.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM EVERETT GRISWOLD. Witnesses:

ARNA E. HAYDEN, N. M. L. PANUSHKA.

